Inside Line took the 2012 Chevrolet Camaro ZL1 and 2013 Ford Mustang Shelby GT500, together, on a field trip: to Westminster, California where where they were both tested on the same dyno at MD Automotive, run the by same operator on the same day. In case any memories need refreshing, the specs run thusly: the ZL1 has a 6.2-liter supercharged V8 belting out 580 horsepower at 6,000 rpm and 556 pound-feet of torque at 4,200 rpm, for a 0-60 time of 3.9 seconds and a top speed of 184 miles per hour. The Shelby GT500 rocks up with a supercharged 5.8-liter boasting 662 hp and 631 lb-ft, for a 0-60 time of 3.7 seconds and a top speed in excess of 200 mph. Both get the power down via six-speed manual transmissions.

All things being equal, the dyno returns should have them split by something like 82 hp and 75 lb-ft. But good luck with equality, at least on this day: the Camaro charted 497 hp and 497 lb-ft, a the kind of 15 percent drop you might expect due to driveline losses, and just 11 percent of its torque sapped.

The GT500 would have none of it, charting 595 hp and 603 lb-ft. That leaves an on-the-road gap of 98-hp to the ZL1, and even though it loses more torque percentage-wise, it still comes out at an absolutely insane 603 lb-ft.

This latest info gives a new round of ammo to the armchair testers until the comparos start rolling in. But as numerous folks have commented on the dyno tests, what's really important is this: this is a great time to be a car enthusiast in America. Scroll down to check out the video.



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  • 186 Comments
      Dean Hammond
      • 2 Years Ago
      time to sit back and veiw excuses....Im SO glad no-one at Ford mouthed off and chestbumped....proof is in the pudding.....now we need a track-off...........
      MONTEGOD7SS
      • 2 Years Ago
      I am still hoping that Ford has a Ford GT style car on the horizon to bolt this beast into. Not sure where the Camaro fanboys get that they handle like a F1 car, while Mustangs handle like ox carts. Roads courses are curves, connected by straightaways, so I think the Cobra will do just fine there. If you want to compare them on an autox track, it makes me question if you even know why these cars are what they are.
        k_m94
        • 2 Years Ago
        @MONTEGOD7SS
        Live axle aside, Mustangs still generally handle better than Camaros, but it is possible that the mass disadvantage of the ZL1 may be outweighed by the wide tires and magnetic shocks, thus handling better than the GT500. On 95% of racetracks, even if the Camaro handles a bit better, the GT500 would just get way too far ahead on the straights for the Camaro to really catch up, even if it were kind of bumpy.
      Adam
      • 2 Years Ago
      Radioactive Flea: You do understand that the GT500 did not go to an aftermarket tuner, correct? Shelby is just the name of the car. Before you argue that the GT500 has a supercharger, I would also like to inform you that the zl1 does as well. It also has a larger engine. I think you should really do your research before you spew off at the mouth. It only makes you look like you're uneducated.
      Michael Sexton
      • 2 Years Ago
      They dyno'd them, i'm sure they were on the track as well. Maybe we'll see the results later this week.
      JohnnyOJ
      • 2 Years Ago
      Somebody needs to re-read the Insideline article. Their dyno chart show that the GT500 produced 595HP and 603lb-ft. NOT 603HP and 497lb-ft. Insideline claims the "GT500 produced 105 lb-ft and 98 horsepower more power than the ZL1". Who's double checking the facts in these articles before posting them?
      Gorgenapper
      • 2 Years Ago
      Mustang looked and sounded better, and put out better numbers.
      Alex
      • 2 Years Ago
      Ok, now would someone please take them to a track (or 5) with the same driver to see what they do head to head when there are turns? Hell, even 1/4 mile times would be nice.
      AE86
      • 2 Years Ago
      I want both.
      mitytitywhitey
      • 2 Years Ago
      " the GT500 produced 105 lb-ft and 98 horsepower more power than the ZL1." "One factor in the larger-than-expected gap in peak power between the two cars pertains to that drivetrain loss -- the ZL1's independent rear suspension just might have more drivetrain loss than the GT500's live rear axle. See, the ZL1's power takes a more tortured path to the ground as it passes through the u-joints that support the two axles at each end. " -inside line article Could also be that Ford underrated the hell outta their engine, and it is really making close to 700hp under ideal conditions at the crank :D
        mitytitywhitey
        • 2 Years Ago
        @mitytitywhitey
        I don't understand why people think SAE means it will produce exactly stock horsepower under all conditions. That couldn't be further from the truth. What SAE means is that unless you're running under less than ideal conditions, you will get at least advertised power. How much over 'at least' is up to Ford. LOTS of SAE certified engines overproduce, particularly on torque.
        Danrar
        • 2 Years Ago
        @mitytitywhitey
        Either way, I love how this went down. GM running their mouths like crazy, Ford let the car speak for itself.
        TrueDat
        • 2 Years Ago
        @mitytitywhitey
        i believe the 5.8L is SAE certified, so it's definitely not underrated.
        Termin8
        • 2 Years Ago
        @mitytitywhitey
        Not the first time I've heard the comment that Ford under-rated the GT500.
      KAG
      • 2 Years Ago
      No suprise, the Mustang has a smaller motor and puts out more power. All the test drive videos I seen on the Camaro say it is hard to see from the back while driving.
      Rob
      • 2 Years Ago
      Maybe I'm reading it wrong but the GT500 loses a smaller percentage of tq as well as hp. 631ftlb rated to 603 at the wheels is more like 5% not over 11%. Hello underrated.
      jdwkinc
      • 2 Years Ago
      Hats off to Ford. After decades of underpowered v6 and v8 engines (terminator aside), they decide to up every model by 100hp or more. I hope all the 2010 v6 and GT owners and especially the 2012 GT500 owners got incredible deals on their cars.
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